Test code in RestSharp 113.1.0
var url = "https://cdn.tailwindcss.com/";
var req = new RestRequest(url);
var option = new RestClientOptions()
{
FollowRedirects = false,
};
var client = new RestClient(option);
var res = await client.ExecuteAsync(req);
var responseUri = res.ResponseUri?.ToString();
The responseUri value should be https://cdn.tailwindcss.com/3.4.17
Both .NET 4.6.2 and .NET 8.0 have the same problem.